Nikon D2Hs has a
4.0MP APS-C (23.7 x 15.5 mm ) sized JFET sensor . On the other hand, Nikon D1X has a
5.0MP APS-C (23.7 x 15.5 mm ) sized CCD sensor .
Below you can see the D2Hs and D1X sensor size comparison.
Sensor Size and Resolution Comparison image of Nikon D2Hs and Nikon D1X Cameras
Nikon D2Hs and Nikon D1X have the same sensor sizes so they will provide same level of control over the depth of field when used with same focal length and aperture. On the other hand, since Nikon D2Hs has 46% larger pixel area compared to Nikon D1X, it has potential to collect more light on pixel level hence have less noise in low light / High ISO images.
Sensor size sets the circle of confusion, so it drives how much depth of field each
of these bodies gives you at a given aperture. You can calculate it exactly for the
Nikon D2Hs
or the
Nikon D1X ,
including hyperfocal distance.